I think it is all a matter of personal opinion. I like the water feature, or gravel with moss option. I can say my first tank I used Jungle Mix soil, and it has held up great, but I do not know if I will use soil again. I might use some leaf litter over gravel, but not sure about soil.
Here are mine:
Leuc:
- gravel
- Jungle Mix ontop (no water feature other than a small store bought pound thing)
Azureus:
- Gravel
- Moss
- Water fall over a rock
imitators:
- gravel
- moss
- water fall down the cork background.
Here are my findings and by no means anything other than my opinion:
1. Water feature helps keep the humidty high, and look nice, but it is not needed as long as some water for them to soak in is around.
2. Soil seems to stick to the frogs, though at least for my leucs does not seem to bother them that much.
3. Gravel can be very heavy and other lighter things may work better.
I plan to try some new ideas in the future. You can see all of my tanks on my site below. Some have changed a little, but nothing major. I plan to change most of the plants in my imitator tank very soon, but still looking for enough light to add the broms I want to.
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Kyle
Dart Links - still a work in progress
1.2.0 D. leucomelas
1.1.0 D. azureus
1.0.1 D. imitators